According to Slashgear, the new event would see a ton of Magikarp added to the wild.

"The reasons for release on each of the events for Pokemon GO add up to some interesting conclusions. For April Fools' Day, one should look to Pokemon Medals to see what Niantic has up its sleeve," the post reads.

"The Pikachu medal became a LOT easier to attain over the past several weeks of December 2016 when Santa Hat Pikachu was made fairly common."

The Fisherman medal, on the other hand, is extremely difficult to obtain, and would take some players years to get.

It makes sense, therefore, that Niantic would give players a helping hand by making Magikarp more plentiful.

Magikarp are considered fairly useless in the world of Pokemon and are often used as a figure of fun. An abundance of Magikarp would also fit the April Fools' Day theme.